diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index c7a8e1f0c6b6..77fecc62a056 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -35,12 +35,12 @@ endif
 endif
 
 cflags-$(CONFIG_CPU_SH2)		:= $(call cc-option,-m2,)
-cflags-$(CONFIG_CPU_SH2A)		:= $(call cc-option,-m2a,) \
+cflags-$(CONFIG_CPU_SH2A)		+= $(call cc-option,-m2a,) \
 					   $(call cc-option,-m2a-nofpu,)
 cflags-$(CONFIG_CPU_SH3)		:= $(call cc-option,-m3,)
 cflags-$(CONFIG_CPU_SH4)		:= $(call cc-option,-m4,) \
 	$(call cc-option,-mno-implicit-fp,-m4-nofpu)
-cflags-$(CONFIG_CPU_SH4A)		:= $(call cc-option,-m4a,) \
+cflags-$(CONFIG_CPU_SH4A)		+= $(call cc-option,-m4a,) \
 					   $(call cc-option,-m4a-nofpu,)
 
 cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= -mb